• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2015, Vol. 51 ›› Issue (9): 191-198.doi: 10.3901/JME.2015.09.191

• 制造工艺与装备 • 上一篇    下一篇

离散型空间焊道CBN砂带当量随行磨削技术

肖贵坚1, 2, 黄云1, 2, 路勇1, 2, 杨宇航1, 2, 王亚杰1, 2, 陈育辉1, 2   

  1. 1.重庆大学机械工程学院;2重庆大学重庆市材料表面精密加工及成套装备工程技术研究中心
  • 出版日期:2015-05-05 发布日期:2015-05-05
  • 基金资助:
    国家自然科学基金资助项目(51275545)

Discrete Spatial Welding Machining Using Equivalent Follow CNB Belt Grinding Technology

XIAO Guijian1, 2, HUANG Yun1, 2, LU Yong1, 2, YANG Yuhang1, 2, WANG Yajie1, 2, CHEN Yuhui1, 2   

  1. 1.College of Mechanical Engineering, Chongqing University; 2.Chongqing Engineering Research Center for Material Surface Precision Machining and Whole Set Equipments, Chongqing University
  • Online:2015-05-05 Published:2015-05-05

摘要: 提出一种离散型空间(椭圆形、马鞍形、相惯线形等)焊道的磨削加工技术——立方氮化硼(Cubic boron nitride, CBN)砂带当量随行磨削方法,该方法一方面基于测量技术以及磨削量预测模型,利用四轴联动以及恒压力浮动砂带磨削技术实现离散型空间焊道当量随形磨削加工,保证焊道的等余量控制;另一方面针对焊道材料的难加工特性,运用CBN砂带实现高效率、高精度磨削加工。阐述了当量随行磨削加工原理,建立随行磨削加工模型,分析随行运动误差。基于测量技术以及磨削量预测模型,建立当量磨削控制方程。针对椭圆形焊道典型零件——燃烧室机匣进行了磨削加工试验,得到其磨削余量厚度误差在±0.005 mm以内,证明该方法的可行性,得到焊道磨削的最优工艺(砂带线速度24 m/s,磨削压力170 N,工件转速1 r/min),并且得到工件旋转速度是影响材料去除率最大的工艺参数。

关键词: CBN砂带, 当量随行磨削, 等余量控制, 离散型空间焊道

Abstract: A grinding technology about discrete type (circular, elliptical, saddle-shaped, etc) spatial welding seam is proposed—the cubic boron nitride(CBN) belt grinding method with traveling equivalence. On one hand, the method is based on the measurement technology and the prediction model of grinding depth, with the four-axes coordinated movement and constant pressure floating-type belt grinding, it can ensure the equal-margin control; on the other hand, aiming at the difficult machining of the welding seam’s material, using of CBN belt can realize the high efficiency and accuracy. The processing principle of the belt grinding method with traveling equivalence and positive-stop is illustrated, the processing model of traveling grinding is built and the influence of grinding depth and swing angle is analyzed. Based on the measurement technology and the prediction model of grinding depth, governing equation of equivalent grinding is obtained. In the end, the grinding test aiming at the typical part of elliptical welding seam—the combustor casing—can make sure the error of grinding margin’s depth in ±0.005 mm, which proves the method’s feasibility, and obtains the optimum processing parameters on grinding the welding seam(grinding belt liner speed: 24 m/s, grinding force: 170 N, workpiece rotating speed: 1 r/min). Furthermore, the most influential processing parameter on material removal rate is the workpiece rotating speed.

Key words: cubic boron nitride belt, discrete spatial welding, equal-margin control, equivalent follow grinding

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